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Finding the Fourth Proportional to 10,620.86, 14,656.82 and 5,905.13

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Solution

The fourth proportional to 10,620.86, 14,656.82 and 5,905.13 is: 8,149.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,620.86 : 14,656.82 = 5,905.13 : x
  2. Step 2: Convert to fraction form
    10,620.86/14,656.82 = 5,905.13/x
  3. Step 3: Cross multiply
    10,620.86x = 14,656.82 × 5,905.13
  4. Step 4: Simplify right side
    10,620.86x = 86,550,324.68
  5. Step 5: Solve for x
    x = 86,550,324.68/10,620.86
  6. Step 6: Final answer
    x = 8,149.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.